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Finding the Fourth Proportional to 116.90, 175.40 and 51.92

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Solution

The fourth proportional to 116.90, 175.40 and 51.92 is: 77.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.90 : 175.40 = 51.92 : x
  2. Step 2: Convert to fraction form
    116.90/175.40 = 51.92/x
  3. Step 3: Cross multiply
    116.90x = 175.40 × 51.92
  4. Step 4: Simplify right side
    116.90x = 9,105.63
  5. Step 5: Solve for x
    x = 9,105.63/116.90
  6. Step 6: Final answer
    x = 77.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.